Nut Color Sorter Manufacturer: How to Choose a Reliable Supplier

Start with Your Finished Product, Not the Machine Catalogue

A processor looking for cleaner hazelnut kernels has a different problem from a pistachio plant separating open and closed shells. A walnut packer may need several kernel color grades, while a pecan line may be more concerned with shell pieces remaining after cracking. Calling all four jobs “nut color sorting” hides the information needed for a sound buying decision.

Before contacting a manufacturer, prepare samples for every required output: accepted product, each saleable grade, definite rejects and borderline pieces. Record the normal incoming defect ratio, the throughput needed during a working shift and the number of passes currently used. This gives the supplier a real specification instead of a list of general wishes.

1. Ask the Manufacturer to Test Normal Production Material

A sample test is the fastest way to move from a sales claim to evidence. The test batch should represent normal production and include difficult defects—not only clean product mixed with a few obvious dark pieces. If operators disagree about certain nuts, include those boundary samples as well.

The test should produce two or more physical streams that you can inspect. Check what remains in the accepted product and how much good material appears in the reject stream. If several commercial grades are required, review each outlet separately. Ask the supplier to keep the recipe stable while recording the feed rate, because product cleanliness, recovery and throughput must be evaluated together.

WESORT conducts material testing around the customer’s actual nut variety, processing stage and quality standard. The purpose is not to demonstrate that a camera can see an obvious color difference. It is to confirm the difficult sorting boundary and use the result to select the machine.

2. Check Whether the Supplier Can Match the Inspection Method to the Defect

Standard optical sorting uses visible characteristics such as color, shape, size and surface texture. It can target visibly discolored, broken, shriveled or misshapen nuts and foreign material when there is a detectable difference. More surface views may be useful when an irregular nut can hide an opening, crack or spot on the side that a conventional view does not capture.

Some jobs need another sensing route. Shell fragments and kernels may look similar in visible light, so infrared recognition can add useful information for shell-kernel separation. If the target is an internal condition inside an intact shell and it produces no reliable exterior signal, an ordinary color sorter should not be presented as the answer; the manufacturer should evaluate whether X-ray inspection is appropriate.

This is a revealing supplier test. A dependable manufacturer explains what the proposed system can observe, where its limits are and why a particular chute, belt, multi-view, infrared or X-ray configuration fits the sample. A supplier that recommends the same machine for every nut and every defect has not yet defined the application.

3. Make Capacity Part of the Sorting Result

Capacity should be stated for a defined material and quality target. Kernel size, moisture, incoming defect concentration, feed uniformity, recipe strictness and the number of passes can all affect working output. A maximum feed figure without those conditions is not enough to size a production line.

Give the nut sorting machine supplier your required finished output per hour or per shift, seasonal peak, available operating hours and expected product changes. Then ask for the test result at a feed rate that keeps the agreed accepted-product standard and acceptable good-product carryover. This makes it possible to compare two proposals on the same basis.

4. Verify That You Are Dealing with a Manufacturer, Not Only a Sales Desk

A manufacturer should be able to explain who develops the sorting software, who selects and assembles the optical and pneumatic systems, how the machine is inspected before shipment and who can modify an application when the standard changes. Buyers should also ask whether they can review the factory, see a live test, receive a test record and confirm the model before the contract is signed.

WESORT was established in 2012 and develops, manufactures, sells and supports AI visual sorting equipment. Its nut portfolio includes conventional chute and belt color sorters, multi-view optical machines, infrared shell-kernel separators, specialized walnut grading equipment and X-ray inspection equipment. That range matters because the recommendation can follow the sorting task rather than forcing every project onto a single platform.

Buyers can review the WESORT company and manufacturing background and the current WESORT nut color sorter range before arranging a test.

5. Look for Cases That Resemble Your Own Production Problem

A customer logo is less useful than a case explaining the incoming material, target separation and result. The following WESORT projects show why buyers should compare applications rather than search for one generic nut-machine testimonial.

Mexico: Pecan Grading and Shell-Kernel Separation

Frutos Las Raíces needed a practical solution for pecan processing and grading, including the separation of shell material from kernels. The WESORT equipment achieved stable sorting quality. The machine was delivered within one week, and local training helped the customer move from installation to daily use. This case is relevant to buyers who need both equipment performance and local commissioning support.

Turkey: Pistachio Color Grading and Shell Removal

A Turkish processor needed to separate pistachio kernels by visible color and remove shell pieces while facing difficulty hiring enough manual sorters. WESORT supplied a 6SXZ-68SC configuration combining visible-color inspection with dual-infrared recognition. The customer reported very good results for both color grading and shell-kernel separation, reducing the pressure created by the labor shortage.

Italy: Hazelnut Quality Control After Cracking

An Italian hazelnut processor needed to separate defective kernels, shells, stones, visibly rotten or shriveled material and half kernels after cracking. The WESORT solution helped make product quality more consistent and reduced dependence on manual sorting. Technical support was used to refine the settings around the customer’s material and required outputs.

Russia: Support After a Walnut Machine Camera Issue

Russian walnut customer Davit Agababyan purchased a WESORT AI double-deck walnut sorting machine after seeing another customer’s equipment. When a camera stopped working, WESORT engineers investigated the issue with the customer. The problem was resolved, the machine returned to normal operation and the customer confirmed that he would contact the team when further needs arose. For a buyer, this type of case says more about supplier reliability than a fault-free showroom demonstration: it shows what happens when production support is actually needed.

6. Define After-Sales Support Before the Machine Ships

Optical sorting recipes may need adjustment when nut origin, harvest, roasting condition or buyer grade changes. Before purchasing, identify who will train the operators, how new recipes are created, which machine data should be shared during remote diagnosis and how spare parts are supplied.

Ask for a clear commissioning and handover plan. It should cover installation conditions, cleaning, routine inspection, output sampling, recipe backup and the first contact for technical support. WESORT combines online technical communication with local or regional support where available; the required service arrangement should be confirmed for the customer’s location in the proposal.

A Practical Supplier Comparison Sheet

Choose the Supplier by What It Can Prove with Your Nuts

The best purchasing decision is based on your material, not the supplier’s most impressive demonstration. A reliable nut color sorter manufacturer will ask what kind of nuts you process, whether they are in shell or kernel form, which visible defects or foreign materials must be separated, how the grades are defined and what production conditions the machine must meet.

Send WESORT representative mixed material, labeled samples for each output, the normal defect ratio, required throughput and information about the available space, power, compressed air and surrounding equipment. WESORT can use those inputs to assess sortability, run a sample test, confirm the difficult boundary pieces and prepare an equipment and line-integration proposal.

Contact WESORT to test your nuts before choosing a sorting machine.